Slag-furnace.



No. 760,172. v PATBNTED MAY 17,1904. R. BAGGALEY a o. s. GARRETsoN.

SLAG FURNAGB.

APrLIoATIoN FILED PEB. 2o, 1902. v No MODEL. I a sHvnB'rs-snnm' 1.

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No.4 760,172. PATENTED MAY 17, 1904.

R. BAGGALEY 6L 0. S. GARRETSON. A

SLAG FURNAUE.

APPLICATION IILBD PEB. 20, 1902. V N0 MODEL. 3 SHEETB-SHEET 2.

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. 'PATBNTED MAY 1v, 1904. R. BAGGALBY 6.-. o. s. GARRETSGN.

SLAG FURNAGE.

APPLIGATION FILED rma. zo. 1902.

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N0 MODEL.

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UNITED STATES e Patented May 17, 1904.

PATENT OEEIcE.;N

RALPH BAGGALEY, OF PITTSBURG, PENNSYLVANIA, AND OLIVER S. GAR- RETSON,OF BUFFALO, NEW YORK, ASSIGNORS TO GARRETSON FUR- NAOE COMPANY, OFPITTSBURG, PENNSYLVANIA, A CORPORATION OF WEST VIRGINIA.

SLAG-FURNACE.

SPECIFICATION forming part of Letters Patent No. 760,172, dated May 1*?,1904.

Application filed February 20, 1902. Serial No. 94,864. (No model.)

10 all whom it may concern:

Be it known that we, RALPH BAGGALEY, re- 'siding at Pittsburg, in thecounty of Allegheny, in the State of Pennsylvania, and OLI- VER S.GAnRnTsoN, residing at Buffalo, in the county of Erie and State of NewYork, citizens of the United States, have invented new and usefulImprovements in Slag-Furnaces, of which the following is aspecification.

This invention relates to a furnace for utilizing the heat contained inmolten slag to heat a steam-boiler or other vessel or apparatus and inwhich the molten slag is carried past the heating-surface of the boileror other vessel or apparatus by an endless flexible carrier.

The object of the invention is to produce a furnace of this nature whichis very simple in construction and easy of operation and in Y which theheat contained in the slag is fully utilized.

In the accompanying drawings, consisting of three sheets, Figure l is asectional elevation of a steam-boiler furnace embodying the invention.Fig. 2 is a horizontal section through the furnace on the line 2 2, Fig.l. Fig. 3 is a sectional elevation of a furnace of slightly-differentconstruction.

Like letters of reference refer to like parts in the several figures.

A represents a closed heating-chamber or furnace of any suitable form orconstruction, in which the steam-boiler B or other vessel or apparatusto be heated is arranged in any suitable manner. As shown in thedrawings, the furnace is rectangular and of considerable height, theinclosing walls being made of or protected by some suitablenon-conducting material to better retain the heat. The boiler, which, asshown in the drawings, is of the upright-water-tube type, is arranged ina slightly-inclined position in the heating-charnber. The boiler issupported in any suitable manner-for instance, as shown, by horizontalbeams I).

D represents the endless carrier for elel vatingthe molten slag from theslag-receptacle and carrying the same up into close proximity to theheating-surface of the boiler or other apparatus, so as to impart theheat of the slag to the same. As shown in the drawings, Figs. 1 and 2,the endless carrier is composed of a series of endless chains hung sideby side in the form ofloops from a series of sheaves or pulleys E,arranged in the upper part of the heating-chamber, so that the lowerends of the chain-loops dip into themolten slag in the receptacle,whereby the chains become coated with the molten slag. Thesupporting-sheaves for the carrier-chains are arranged above the boilerand mounted on a horizontal shaft e, supported at its ends in anysuitable manner. The upwardly-moving runs of the carrier-chains `passthrough openings e' c2, provided for this purpose in the upper and lowerheads of the boiler and run between adjacent rows of the boilertubes.

The carrier-chains are driven by any suitable Ineans, but preferably bysprocket-wheels F, which are arranged in pairs `on opposite sides of thedownwardly-moving runs of the chains. The several sprocket-wheels, whichare arranged on the same side of the several chains, form a set and aresecured to the same shaft f. The shafts of the two sets extend throughthe opposite walls of the heatingchamber and are journaled outside ofthe chamber in bearings f These shafts are driven in opposite directionsby any suitable mechanin the closed heating-chamber.

ism to cause each pair of sprocket-wheels to grip the carrier-chain andpropel the latter in the proper direction. The mechanism shown fordriving these shafts consists of a driving sprocket-wheel f2, securedtothe end of one of the shafts, and a pair of gear-wheelsf3, connectingthe shafts.

The sprocket-wheels F for driving the carrier-chains also serve todetach the congealed slag from the chains by gripping the latter, andthereby breaking and detaching the slag which adheres to the chains as athin film or scale, and which by the time it reaches thesesprocket-wheels has become so brittle as to be easily detachable fromthe chains. This congealed or chilled slag as it is removed from thecarrier-chains by the sprocket-wheels is between adjacent tubes and theflanges ofv which extend toward each other on the front and rear sidesof the tubes. The beams thus incase the tubes and prevent thecarrier-chains or any slag which might drop from the same from coming incontact with the tubes and injuring the same. I

K represents a shield or wear-plate which extends through the opening inthe lower boiler-head.. The upwardly-moving runs of the carrier-chainsbear against this shield, which wipes any surplus molten slag from thechains and prevents contact of the latter with the adjacent side of theopening @2 in the lower In the form of the furnace shown in Fig. 3 thetubes of the boiler are arranged in vertical rows and two endlesscarriers D are employed, each composed, as in the first-describedconstruction, of a series of chains hung in loops on a series of sheavesE. Each run of each carrier-chain is located between two rows ofboiler-tubes. The chains are each driven by Aopposite sets ofsprocket-wheels F', which also serve to detach the chilled slag. The.latter is conveyedby chutes G, one for each carrier,

from the furnace and discharged into a car or other receptacle H.

In both forms of the furnace the receptacle for the molten slag islocated beneath the boiler The heat con tained in the slag is therebyconfined within the chamber and utilized partly by carrying the slagpast the heating-surface by means of an endless carrier and partly byradiation from the body of slag in the receptacle. As there is always aconsiderable body of the molten slag in the receptacle beneath theboiler or other vessel, the latter is evenly heated and the slag in thereceptacle is kept from cooling.

XVe claim as our invention4 l. The combination of a steam-boiler, or thelike, having an upright heating-passage, a receptacle for molten slagarranged below said heating-passage, an endless traveling slag-carriersuspended in the form of a loop which dips with its lower portion intothe slag-receptacle,

velevating slag therefrom and passing with its ascending portion, coatedwith molten slag, through said heating-passage for imparting heat tosaid boiler, and mechanism acting upon the carrier after it has passedthrough said heating-passage for detaching the congealed slag from thecarrier, substantially as set forth.

2. The combination of a steam-boiler, or the like, having uprightheating-passages, a receptacle for molten slag arranged beloiv saidpassages, an endless traveling slag-ca1trier suspended in the form of aloop which dips with its lower portion into the slag-receptacle, elelvating slag therefrom and passing with its ascending and descendingportions through said passages, and mechanism acting upon the carrierafter it has passed through said passages for detaching the congealedslag therefrom, substantially as set forth.

3. The combination of asteam-boiler, or the like, having aheating-passage, a receptacle for molten slag located below saidpassage, an endless traveling slag-carrier which dips into saidreceptacle, elevating slag therefrom and passing with its ascendingportion through said `heating-passage, and wheels between which saidcarrier runs and which are arranged beyond said heating-passage fordetaching the congealed slag from the carrier, substantially as setforth.

4. The combination of a heating-chamber provided in its lower portionwith a receptacle for molten slag, an apparatus to be heated arranged insaid heating-chamber above said slag-receptacle, an endless iiexiblecarrier suspended in said heating-chamber in the form of a loop, one runof which extends through a space in said apparatus, and means fordriving said endless carrier to elevate the slag through said space insaid apparatus, substantially as set forth.

5. The combination of a heating-chamber, a receptacle for molten slaglocated in said chamber, an endless flexible carrier located in saidchamber and which extends into said slag-re- IOS ceptacle, and wheelsfor driving said endless means for discharging the detached slag fromsaid chamber, substantially as set forth.

ln testimony whereof we have signed our names to the specification inthe presence of two subscribing wltnesses.

RALPH BAGGALEY. OLIVER S. GARRETSON.

Witnesses to the signature of Ralph Baggaley:

MALCOLM L. MACDONALD, AZELLE E. HOBART. Witnesses to the signature ofOliver S. Garretson:

JNO. J. BONNER, CLAUDIA M. BENTLEY.

